M4.1 earthquake 79 km SW of Yonakuni, Japan
A magnitude 4.1 earthquake struck 79 km SW of Yonakuni, Japan on Thu, Jan 31, 1985, 12:20 AM GMT+8 (16:20 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.6 119 km S of Yonakuni, Japan. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.1 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1985-01-30 16:20:45 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 23.968° N, 122.442° E
- Region
- Japan
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Depth from
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 6 in the 30 days before it.
After
- 4.847 km WSW of Yonakuni, Japan · 15213 days ago · 60 km deep · 37 km away
- 5.6119 km S of Yonakuni, Japan · 15200 days ago · 33 km deep · 99 km away
- 5.156 km ESE of Jiufen, Taiwan · 15181 days ago · 11 km deep · 99 km away
Before
- 3.810 km SSE of Hualien City, Taiwan · 15228 days ago · 22 km deep · 83 km away
- 4.232 km E of Hualien City, Taiwan · 15228 days ago · 13 km deep · 53 km away
- 4.945 km E of Hualien City, Taiwan · 15229 days ago · 37 km deep · 41 km away
- 3.859 km E of Hualien City, Taiwan · 15229 days ago · 33 km deep · 28 km away
- 4.448 km E of Yilan, Taiwan · 15230 days ago · 41 km deep · 91 km away
- 5.570 km SW of Yonakuni, Japan · 15236 days ago · 43 km deep · 15 km away
Earthquakes todayJapan earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002bg8. Read Thu, Oct 1, 2026, 9:19 PM UTC.